we still have the juwel filer in there... as you look at the back corner the intake is on the left of the juwel filter.
the spray bar then runs along the right side of the tank.
I dont know what flaps the 190 has on the top but the 350 has a triangular section at the back - it stays open slightly as i dont want to cut it about so it rests on the pipework.
The spray bar comes in sections so you can make it the length you need. the 350 actually lets you use it all - just.
In the rio 240 i had to cut one ot the sections down to fit in as much as I could.
Let me know if you want pics